(of a surface or background) unrelieved by decorative or other features; bare, empty, or plain. Showing incomprehension or no reaction. Complete; absolute (used emphatically with negative force). A space left to be filled in a document. A cartridge containing gunpowder but no bullet, used for training or as a signal. An empty space or period of time, especially in terms of a lack of knowledge or understanding. An object that has no mark or design on it, in particular. A dash written instead of a word or letter, especially instead of an obscenity or profanity. Cover up, obscure, or cause to appear blank or empty. Defeat (a sports opponent) without allowing the opposition to score.